With fossil records dating back to 400 million years ago, sharks have lived even     1     (long) than the dinosaurs and many other forms of life. There are more than 500 species of sharks     2     (discover) on earth.

These sharks,     3     are so important to the natural order of marine ecosystems, are faced with     4     (extinct). While they have been an important resource for coastal communities in the developing world for     5     (century), this unique balance is in danger of being lost forever.

As our oceans are     6     (serious) influenced by the greenhouse effect, to restore these water bodies is the key     7    protecting sharks. What’s more, sharks’ wide range of species adds difficulty to the conservation efforts of protecting these     8     (amaze) creatures. And the great demand for their fins     9     (increase) the urgency of the task over the past few years. Through the effective strategies, we are trying to restore the balance between humans     10     sharks.

Pandas are not only a national treasure, but are loved around the world. The furry black-and-white animals have played     1     important role in the country's diplomacy (外交).

According to the Japanese Royal Annual, the practice dates back to the Tang Dynasty, when Empress Wu Zetian sent a pair of pandas     2     the Japanese emperor. China renewed panda diplomacy in the 1950s when China sent two pandas to the Moscow Zoo. By 1982, China     3     (give) 23 pandas to nine different countries. However, most of them have died. China stopped     4     (give) away pandas in the early 1980s. Instead, the animals are loaned to other countries. In general, they are to be returned to China after 10     5     (year).

But these cute Pandas are much     6    （difficult）to survive in other countries than in China. Why? According to Xinhua, their eating habit is one main reason. Their nutrition     7    (most) comes from bamboo shoots. Adult giant pandas consume about 40 kilograms of bamboo daily . However,     8     takes 10 years for a new crop of bamboo to mature（成熟）, and many countries do not have an environment     9     is suitable for bamboo to grow.

Based on the idea of a community with a shared future for mankind （人类命运共同体）, countries are trying their best to protect them. "We don't own the pandas,     10     the whole world wants to help save the panda, and we do that through our knowledge exchange, " Steven Mon fort, director of the Smithsonian's National Zoo said.

Today, people hold the race     1     (different) from place to place. Along the Miluo River in Hubei Province, a grand opening ceremony is held before the race starts. At the ceremony dozens of men in new clothes, with     2     (burn) candles in hands, walk around boats three times to show worship of Lu Ban, the master craftsman; then they carry, on their shoulders,     3     image of dragon’s head to the Temple of Qu Yuan,     4     they pay their respect to this saint; finally they tie red ribbons     5     the boats and pull them into the river for the race. At the crack of signal gun, the boats race ahead like discharged arrows     6     (fit) to bowstrings while both banks are a hubbub of voices, a babel of firecracker explosions and a scene of fluttering colored banners. In Sichuan’s Luzhou and     7     (it) nearby regions, the racers in a dragon boat include a commander, a drummer and some rowers. The commander, standing on the bow, waves a flag and sings a race song to synchronize (使同步) rowing movements while the drummer beats a drum with all his strength     8     (cheer) the rowers on. In the areas of Xiamen and Zhangzhou of Fujian Province, a big     9     (wood) boat is arranged lying at the finishing line. When race boats reach the line, a number of ducks     10     (release) from the big wooden boat into the river for all the racers to catch amid thunderous cheers of spectators on the banks.